A Laser Interferometric Technique for Crack Surface Displacement Measurement,
Abstract
The opening of a fatigue crack in an aluminum specimen was measured by optical interference from single grooves ruled on both sides of the crack. Displacement can be measured with a sensitivity of 0.1 micron, making the technique particularly useful in studies of crack closure. Details of this easy, inexpensive technique are discussed in this report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1974
- Accession Number
- ADA001621
Entities
People
- Alten F. Grandt Jr.
- William N. Sharpe Jr.
Organizations
- Air Force Research Laboratory